maintenance service. exclusively for OST customers.

To make sure you can enjoy the natural beaty of your wood windows and doors, OST offers you a maintenance service. We recommend that you have the fittings, air- and watertightness and surfaces of your windows and doors professionally checked and maintained from time to time. This service is performed by our own specialists and includes examining them to make sure that everything is in perfect working order, oiling and, if required, adjustment of the fittings, checking of all seals, and general inspection of the surfaces as well as any required light cleaning and touching-up.